[Lloyd doesn't know what Sleepel is, but he can guess from the context.]

There's really monsters out there that can make you fall asleep?

[That's a startling (and alarming!) thought.]

What would keep them from killing you while you're asleep?

[But, aw yeah, someone who can appreciate his sometimes dorky humor! Hearing Zack laugh makes that grin spread even further, but more than that, he wants to see if he can provoke it again. If Zack laughed at the first pun, surely he'll laugh again at a second!]

What about saying it was easy as pie?